1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb21753fca37730ba8365b1604eed753ff3b3dbf0268ff3aeac011f4b6e12a5c. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab9ed070-54d0-479b-b4a2-40eab8927b0e.json and https://artists.proofprofile.net/proofs/artist/ab9ed070-54d0-479b-b4a2-40eab8927b0e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1509413d53f5edbbcb3bce02c98123940ce3e69a1e32ed13e32b79d06fdf3165. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d511c50b422e91f0ccad5f9dd109d42cb0e243b13996409a10d011a6b44f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc23346c60bceef53eef95b55f2d02b4bb60aa66e25b3c9a7fec7bce5fc9e2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51236a6e44cfe4cb0d14b0a61c0d3c1401f048f0e95c9f88eb039a7eed2a793c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c19b85a280a4b45ce65d7c8c6c0ad4a59ee54cb1d0a716e9391096e48c23e82. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581c5bc9ac489d7f5df77e168298ec2d9020676f649e62e70d84d57161aff1e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339473e992863b7a7bf92622165f5defec8864dce0f7c54e7ba132a4a7df2fcf. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6842da64eca7da1c2e21e3c2e7bbe6442b0ca74e901e8fd8798d3053b4dd70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541784600.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774f1a96a6a4624d9cf1ac123d7a3dd9bb1c7df32f496f79e25527240a5a2084. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761ad73b2d88e7094484ac66dc706807ea10bf120251b8203f74031a9c39fc7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b84cac63f9f96a0a30f487ad0e1ca1fc5182eb4f23f8bc27fc36064b139dd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649440b7702c68b8701a70341322c165b166c3bd25e37f5988c8ea28d2a506e6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f84ba80c111e4f0cf036dd6f4e166b446efbe4518c3ba07d046f8168999d6f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01722f6b5e50fa2765b72d86383a2519d78867c1f8f0452338b091dae194c2bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26706b9dbd23f08878588087a8c9894758fde1cefb1ae63e4eb09831f5f618f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbac79a2b34bee4cb1666d1521cc3786b00994a14301771614f955db8833154f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce6bdcd02d531885512acee336ae9007a9e34e14ec1896a1d3155072fb47f5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560e9d27de51db23c47ece7351a22b45e85b0603f727ca9beee7bb276448232b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f91c375dd008ba9ff271f655c2f7572a0681bfe4d8db9fabc93fd852dda949b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8GV2420990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934769badbe910e9353069f6aa582157bd2fa8d348c25bf0b20099368cdff5cd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541664198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee609322dd5946f0a0e68244b8381d891c87d16fbf2f6b463694984829c75b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542354813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d4da82510fcdf6b75cb00243df5d4f30b3f49f4151f1a5d0fad8d225fe3524. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542354806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c3de1a5e3294e022ab8e65f31e9f70744a7059d0c4b3d8cad3fb6642e9ef27. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92cab2451865417355cdad230b2e422266c2434d6e3523c8cfe69ac745bda7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21426fccb9dd48761838e419fe4418cc3fff477a665cdab0a0b8f1a4340509c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519453b4be84876475dc6aaf7e7c039fbd1e5512b486a9d644f01af105e394e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab770fa01e98047b7eced6926d5e663e298100ef3bcac0d600046d3b31fa4f8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded84c180b37a502b8ce757dffc771b77d240e99c2df5141ddeaeaef35de80f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d9f59432333d50d1c0cbdea539ba1891618a66138de54ce9e0b48380874e05. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735692702a13676d917dd843a9cc8418b4764eadeaaf4a8aa8956e6fad178dc2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd12b1ce9764136d6b5220e33259fc69f0dff5ec6f321ac305fbfdbf98c231b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3537769d2118a173c413f9e4cfec430cdfef6abffcc835b4d878beabf53de5e5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106d32909ae004afe4f8bc7d8bf9a7c6597829aee05e3a603bf85a7265ffc902. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4b663d18c4a317f666231b165e3943a30412f1e78fa11241b59e3b37bacd85. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41544759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894455e4f27bc1b52e32968ac0e6c3100eb55e27addbb7806e4cd91f318b5b7c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541940256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96fd30ae7b5827dcc85853aa3ebb0b50615f7583c9140c743e6f72a148e15d5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6541834869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a729827158a2d7fdbfa58e7b9fb11f91e40d8bb79f93f3c260e46654166f2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542418398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6570e978ab59614f102731f72d623c8fa04db0f0c4022c7208f771da33ea52ff. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIX2478458.
7 Mercenaires (Extrait du projet 7éme Art du Rap)